Computer Knowledge

Computer File Systems

1,249 Questions

Computer file systems dictate how data is stored, organized, and retrieved on storage devices. Important concepts include file allocation tables, access mechanisms, and various formats like sequential and video files. Candidates preparing for banking and government exams should practice these fundamentals thoroughly.

File access mechanismsVideo and password filesFile extensionsFile allocation tableSystem metadata

Computer File Systems Questions

Multiple choice

The operation performed on a file in which the file attributes are not changed but the file has a reduced size because the user deletes information in the file is _______________.

  1. truncating a file

  2. deleting a file

  3. reading a file

  4. writing a file

  5. creating a file
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the operation performed on a file in which the file attributes are not changed but the file has a reduced size because the user deletes information in the file.

Multiple choice

____________ is the directory structure in which directory is a tree of height two with the master file directory at the root having user directories as descendants.

  1. Single level directory

  2. Two-level directory

  3. Tree structure directories

  4. Directory

  5. File
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This directory structure is the one in which directory is a tree of height two with the master file directory at the root having user directories as descendants.

Multiple choice

The file name with extension .WebM is

  1. an Audio File Format

  2. a Video File Format

  3. an Image File Format

  4. a Word Document

  5. a Portable Document Format
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Actually file name with .WebM extension is a Video File format intended primarily for royalty-free use in the HTML5 video tag. So, this option is correct.

Multiple choice

Periodically adding, changing and deleting file records is called

  1. file updating

  2. file upgrading

  3. file restructuring

  4. file renewing
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

File updating refers to the ongoing process of maintaining files by periodically adding new records, changing existing records, and deleting obsolete records. This is a fundamental operation in file-based systems to ensure data remains current and accurate over time.

Multiple choice

A locked file

  1. can be accessed only by one user

  2. can be modified by user with correct password

  3. is used to hide sensitive information

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A locked file can be accessed by only one user at a time to prevent concurrent modifications that could corrupt data or cause inconsistencies. Other users must wait for the lock to be released.

Multiple choice

A report generator is used

  1. to update files

  2. to print files on paper

  3. for data entry

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A report generator produces formatted output from database data, typically for printing reports. Option A is incorrect because report generators read data rather than update files. Option C refers to data entry which is a separate input function.

Multiple choice

A large computer information system maintains many different computer files. Which file is perpetual file?

  1. Log File

  2. Master File

  3. Specialized File

  4. Update File
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A master file contains permanent, relatively stable data that persists over time and serves as the primary reference for an organization's operations. Examples include customer master files, product inventory files, and employee records. Unlike temporary files (logs, updates), master files are perpetual and continuously updated with valid changes rather than being recreated periodically.

Multiple choice

What are two predefined FILE pointers in C?

  1. Stdout and stderr

  2. Console and error

  3. Stdout and stdio

  4. Stdio and stderr

  5. Errout and conout
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Standard C defines three predefined FILE pointers: stdin, stdout, and stderr. Option A correctly identifies stdout and stderr. 'Console', 'error', 'stdio', 'errout', and 'conout' are not standard predefined FILE pointers in C.

Multiple choice

FILE *f = fopen( fileName, "r" ); readData( f ); if( ???? ) { puts( "End of file was reached" ); }

Which one of the following can replace the ???? in the code above to determine if the end of a file has been reached?

  1. f == EOF

  2. feof( f )

  3. eof( f )

  4. f == NULL

  5. !f
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In standard C input/output library operations, feof(f) is the correct function used to check whether the end-of-file indicator has been set for the given file stream. EOF is an integer macro value returned by reading functions rather than a stream condition check macro.

Multiple choice

Which of the following Standard C functions can be used to reset end-of-file and error conditions on an open stream?

  1. clearerr()

  2. fseek()

  3. ferror()

  4. feof()

  5. setvbuf()

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

clearerr() resets both the EOF and error indicators on a stream, allowing further I/O operations. fseek() only clears EOF on some implementations, not errors. feof() and ferror() only test conditions. setvbuf() controls buffering. Only clearerr() explicitly resets error/EOF states.